Anyone have info about preventing hapuu from toppling over?

[bgiles]

Aloha! No sure what causes this, but the only one at my place on it's side was downed by pigs. If this is common, suggest some big chunks of pahoehoe around base. I was telling a friend the other day that upper Puna reminded me of Bagio (sp?) in the Philippines, but the tree ferns there seemed even taller....